diff --git a/clusters/cl01tl/helm/kube-prometheus-stack/values.yaml b/clusters/cl01tl/helm/kube-prometheus-stack/values.yaml
index 3da343d16..07ff6cb8e 100644
--- a/clusters/cl01tl/helm/kube-prometheus-stack/values.yaml
+++ b/clusters/cl01tl/helm/kube-prometheus-stack/values.yaml
@@ -112,7 +112,7 @@ kube-prometheus-stack:
             accessModes: ["ReadWriteOnce"]
             resources:
               requests:
-                storage: 250Gi
+                storage: 500Gi
 ntfy-alertmanager:
   global:
     fullnameOverride: ntfy-alertmanager